I think 2 but I’m not very sure
Neutrons
The atomic mass is the weight of the protons and neutrons in the nucleus.
By the late 1830s, botanist Matthias Schleiden and zoologist Theodor Schwann were studying tissues and proposed the unified cell theory. The unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells.
Hyperkeratosis is amy lesion with overgrowth and thickening of the skin, such as warts, calluses, and corns.
An animal that only eats meat is called a carnivore
An animal that eats both meat and vegetation is called an omnivore
An animal that only eats vegetation is called a herbivore
